Electrical apparatus.



PATENTED MAR. 19, 1907'.

G.N.LORD. v ELECTRICAL APPARATUS. APPLICATION FILED MAILY, 1906.

' ml um /mrlesil Lord 83% y Wit "eons THE mums PETERS co.,WAIHINB'IONn). c.

UNITED ETATIES PATENT OFFICE.

OI'IARLES N. LORD, OF SANTA FE, TERRITORY OF NEW MEXICO.

ELECTRICAL APPARATUS.

Specification of Letters Patent.

Patented March 19, 1907.

Application filed March 7,1906. Serial No. $041,764.

To all whmn it may concern:

Be it known that I, OHARLEs N. LORD, a citizen of the United States,residing at Santa Fe, in the county of Santa Fe and Territory of NewMexico, have invented new and useful Improvements in ElectricalApparatus, of which the following is a specification.

This invention relates to electrical heaters, the object of theinvention being to provide a small hand implement adapted for heatingdental instruments and the like, the device being especially designedfor use in office and laboratory work for enabling a dentist to quicklyheat the dental instruments used in his Work.

\Vith the above and other objects in view the invention consists in thenovel construction, combination, and arrangement of parts hereinaftermore fully described, illustrated, and claimed.

In the accompanying drawings, Figure 1 is a plan view of an electricalheating device embodying the present invention. Fig. 2 is a longitudinalsection through the same.

Referring to the drawings, 1 designates a handle or handpiece which ispreferably com posed of insulating material, such as hard rubber, andmade hollow throughout the major portion of its length to receive aplurality of conductors, two of such conductors being shown at 2 and 3,respectively, passing through and beyond one end of the handle andterminating and being secured in the other end of the handle.

At one end the handle is closed, with the exception of parallel passages4, in each of which is arranged a terminal-holding socket 5, consistingof a metal tube. These tubes are held fast and permanently in the solidend of the handle, and the extremities of the conductors 2 and 3 arestripped of their insulation and inserted into the inner ends of thesockets and electrically connected therewith, as shown in Fig. 2.

In the outer ends of the sockets 5 are inserted conductor-terminals 6,composed of carbon or graphite or similar material. The conductors 2 and3 are shown as twisted together within the handle 1, and the outer endsthereof may be connected to any suit able source of electrical supply(indicated at 7 either in the form of dry cell-batteries or anyelectric-light circuit or any source of supply involving an electricalcurrent.

To heat a dental implement or the like, the carbon terminals are placedin contact with such implement, thereby closing and completing theelectrical circuit, which thus passes through and heats the implement tothe desired temperature, depending upon the length of time the circuitis allowed to pass through the implement.

The terminal-holding sockets 5 consist of metal tubes of any suitablelength, the same being insulated from each other by reasonof the factthat they pass through and are embedded in the insulating material ofwhich the handle 1 is composed.

I claim 1. The combination with a source of electrical supply, of aninsulating-handle provided with sockets insulated from each other,conductors leading from the source of supply to said sockets, andterminals of graphite or like material inserted in said sockets.

2. The combination with a source of electrical supply, of one or moredry-b attery cells, lead-wires extending therefrom through the handle,metallicsockets in which said leadwires terminate, and carbon or likeelements inserted in said metallic sockets and projecting beyond thehandle.

3. The combination with a source of electrical supply, of conductorsleading therefrom, an insulating-handle in which said conductors arereceived, metal tubes projecting from the end of the handle and havingthe conductors electrically associated therewith, and carbon or likeelements inserted in said metat ubes and having their extremitiesprojecting therefrom, substantially as described.

In testimony whereof I a'l'lix my signature in presence of twowitnesses.

CHARLES N. LORD.

Witnesses:

MYRoN A. FIsKE, DAVID KNAPP.

